INVESTIGATION OF THE ASPHALTENES FROM COAL MACERALS BY ELEMENTAL ANALYSIS AND 1H NMR SPECTROMETRY
| Autor: | H. Machnikowska, S. Jasieńko |
|---|---|
| Rok vydání: | 1991 |
| Předmět: |
business.industry
Inorganic chemistry technology industry and agriculture Maceral chemistry.chemical_element respiratory system Coal liquefaction complex mixtures respiratory tract diseases Petrography chemistry Elemental analysis otorhinolaryngologic diseases Organic chemistry Coal business Vitrinite Carbon Asphaltene |
| DOI: | 10.1016/b978-0-7506-0387-4.50184-4 |
| Popis: | Publisher Summary Asphaltenes are intermediate products of various coal liquefaction processes and important components of coal-derived liquids. This chapter discusses a study for the determination of the structure of asphaltenes separated from the products of hydrogen donor extraction of different rank hard coals and their petrographic constituents, vitrinites, exinites, and inertinites. The coals used in the study were flame coal, gas-flame coal, gas-coking coal, and orthocoking coal. The separated petrographic constituents were characterized by purity over 90% and in case of vitrinites and some fusinites about 99%. Vitrinites of coals containing up to 85.6% of carbon give similar yield of asphaltenes. The asphaltenes separated from the exinite extraction products show higher hydrogen and lower heteroatoms contents than those from corresponding parent coals, vitrinites, and fusinites. 1 H NMR spectra indicate that vitrinite asphaltenes are significantly more aromatic than exinite-derived ones. |
| Databáze: | OpenAIRE |
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